Most prime lenses are good for IR, but some do suffer, including FA43. For zoom lens, the best is the kit I or II. You don't need great optics for IR photos, especially if you are shooting w/ an IR filter infront of a lens. The expose time is so long, a light wind will make the leaves blurry.
Several IR friendly lenses that I used: M20/4, DA21/3.2, DA 18-55, DA50-200. I know some guys might be interested to use Sigma 10-20 or DA 12-24 for IR, but I have to disappoint you. Both lenses produce hot spots, especially the DA12-24